SIP

If you’re running a SIP-based PBX system (Asterisk, FreeSWITCH, FreePBX, MikoPBX, etc.) exposed to the internet, you’re likely seeing constant authentication attacks from bots scanning for vulnerable systems. Here’s a simple, elegant firewall solution that stops these attacks before they ever reach your PBX. The Problem Traditional firewall approaches try to rate-limit authentication attempts or…